<!DOCTYPE html>
<html lang="zh-cn">
<head>
	<meta charset="UTF-8">
	<title>响应式网格（栅格化）布局</title>
	<link rel="stylesheet" href="css/index.css">
</head>
<body>

	<div class="row">
		<div class="col-md-4 col-sm-6"><div class="inner">1</div></div>
		<div class="col-md-4 col-sm-6"><div class="inner">2</div></div>
		<div class="col-md-4 col-sm-12"><div class="inner">3</div></div>
	</div>
	<div class="row">
		<div class="col-md-3 col-sm-3"><div class="inner">4</div></div>
		<div class="col-md-6 col-sm-6"><div class="inner">5</div></div>
		<div class="col-md-3 col-sm-3"><div class="inner">6</div></div>
	</div>
	<div class="row">
		<div class="col-md-1 col-sm-2"><div class="inner">7</div></div>
		<div class="col-md-1 col-sm-2"><div class="inner">8</div></div>
		<div class="col-md-2 col-sm-8"><div class="inner">9</div></div>
		<div class="col-md-2 col-sm-3"><div class="inner">10</div></div>
		<div class="col-md-6 col-sm-3"><div class="inner">11</div></div>
	</div>
	
</body>
</html>